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"use strict";
/**
* @license
* Copyright 2013 Palantir Technologies, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var tsutils_1 = require("tsutils");
var ts = require("typescript");
var Lint = require("../index");
var OPTION_ALLOW_NULL_CHECK = "allow-null-check";
var OPTION_ALLOW_UNDEFINED_CHECK = "allow-undefined-check";
var Rule = (function (_super) {
tslib_1.__extends(Rule, _super);
function Rule() {
return _super !== null && _super.apply(this, arguments) || this;
}
Rule.prototype.apply = function (sourceFile) {
return this.applyWithFunction(sourceFile, walk, {
allowNull: this.ruleArguments.indexOf(OPTION_ALLOW_NULL_CHECK) !== -1,
allowUndefined: this.ruleArguments.indexOf(OPTION_ALLOW_UNDEFINED_CHECK) !== -1,
});
};
return Rule;
}(Lint.Rules.AbstractRule));
/* tslint:disable:object-literal-sort-keys */
Rule.metadata = {
ruleName: "triple-equals",
description: "Requires `===` and `!==` in place of `==` and `!=`.",
optionsDescription: (_a = ["\n Two arguments may be optionally provided:\n\n * `\"allow-null-check\"` allows `==` and `!=` when comparing to `null`.\n * `\"allow-undefined-check\"` allows `==` and `!=` when comparing to `undefined`."], _a.raw = ["\n Two arguments may be optionally provided:\n\n * \\`\"allow-null-check\"\\` allows \\`==\\` and \\`!=\\` when comparing to \\`null\\`.\n * \\`\"allow-undefined-check\"\\` allows \\`==\\` and \\`!=\\` when comparing to \\`undefined\\`."], Lint.Utils.dedent(_a)),
options: {
type: "array",
items: {
type: "string",
enum: [OPTION_ALLOW_NULL_CHECK, OPTION_ALLOW_UNDEFINED_CHECK],
},
minLength: 0,
maxLength: 2,
},
optionExamples: [
true,
[true, "allow-null-check"],
[true, "allow-undefined-check"],
],
type: "functionality",
typescriptOnly: false,
};
/* tslint:enable:object-literal-sort-keys */
Rule.EQ_FAILURE_STRING = "== should be ===";
Rule.NEQ_FAILURE_STRING = "!= should be !==";
exports.Rule = Rule;
function walk(ctx) {
return ts.forEachChild(ctx.sourceFile, function cb(node) {
if (tsutils_1.isBinaryExpression(node)) {
if ((node.operatorToken.kind === ts.SyntaxKind.EqualsEqualsToken ||
node.operatorToken.kind === ts.SyntaxKind.ExclamationEqualsToken) &&
!(isExpressionAllowed(node.right, ctx.options) || isExpressionAllowed(node.left, ctx.options))) {
ctx.addFailureAtNode(node.operatorToken, node.operatorToken.kind === ts.SyntaxKind.EqualsEqualsToken
? Rule.EQ_FAILURE_STRING
: Rule.NEQ_FAILURE_STRING);
}
}
return ts.forEachChild(node, cb);
});
}
function isExpressionAllowed(node, options) {
if (node.kind === ts.SyntaxKind.NullKeyword) {
return options.allowNull;
}
return options.allowUndefined &&
node.kind === ts.SyntaxKind.Identifier &&
node.originalKeywordKind === ts.SyntaxKind.UndefinedKeyword;
}
var _a;
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